science

Import replacement

Import replacement is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Import replacement rather than just read about it. In short: Import replacement refers to an urban free market economic process of entrepreneurs replacing the imports of the city with production from within the city. The idea was invented by Jane Jacobs who spun off from the idea of import substitution developed by Andre Gunder Frank and widely discussed during the first and second Latin American debt crisis.

Key takeaways

Import replacement belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Import replacement to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Import replacement from memory before moving on to harder problems.

Reference excerpt

Import replacement refers to an urban free market economic process of entrepreneurs replacing the imports of the city with production from within the city. The idea was invented by Jane Jacobs who spun off from the idea of import substitution developed by Andre Gunder Frank and widely discussed during the first and second Latin American debt crisis. Import substitution is a national economic theory implying that if a nation substituted its imports with national production the nation would become wealthier, whereas Jacob's idea is entirely about cities and could be called urban import substitution. However, even this would lead to confusion since, in practice, import substitution in India and Latin America was government subsidized and mandated, whereas Jacobs' concept of import replacement is a free market process of discovery and division of labor within a city.

References

Worked examples

Example 1 — a first encounter with Import replacement

Start with the simplest possible case. Write down what Import replacement claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Import replacement before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Import replacement ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Import replacement

In research: Import replacement appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Import replacement in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Import replacement is common in secondary-school and first-year university syllabi. It links to neighbouring topics Development economics, Economic terminology stubs, Import, so understanding it makes those chapters shorter.
In everyday life: Look for Import replacement outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Import replacement in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Import replacement means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Import replacement out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Import replacement in simple terms?

Why does Import replacement matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Import replacement?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Import replacement.